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It’s possible that dark matter may only interact gravitationally, which would be a worst-case scenario for physicists. Journalist Joseph Howlett explains why on this week’s episode of Unexplainable, available on Netflix or wherever you get your podcasts. Subscribe to our channel and turn on notifications (🔔) so you don't miss any videos: http://goo.gl/0bsAjO Vox.com is a news website that helps you cut through the noise and understand what's really driving the events in the headlines. Check out http://www.vox.com. Watch our full video catalog: http://goo.gl/IZONyE Follow Vox on TikTok: http://tiktok.com/@voxdotcom Check out our articles: https://www.vox.com/ Listen to our podcasts: https://www.vox.com/podcasts